Transcript PPT Version

IPv6 over 802.16 IPv6CS
B. Patil, JH. Choi, B. Sarikaya, F. Xia, S. Madanapalli
November 7, 06
What the I-D specifies:
Addressing and Operation of IPv6 over
the IPv6 convergence sublayer of
802.16
 Recommends the assignment of
unique prefix(es) for each host

 Based
on a point-to-point link between the
host and the AR
The IPv6 convergence sublayer
The 802.16 MAC is connection oriented
 The CS is a part of the MAC
 Multiple variants of service specific CS’
exist

 IPv6
CS, IPv4 CS and Eth CS are types of
Packet CS

IPv6 runs directly over the 802.16 MAC
(I.e over the IPv6 CS part of the MAC)
Network model
A
IPv6Host
BS/IPv6 AR
Transport Connection (CID)
B
IPv6Host
CIDx
CIDy
IPv6Host
BS
IPv6 AR
IPv6 Link
Host
IPv6
IP-CS
MAC
PHY
BS
IP-CS
MAC
PHY
GRE
IP
LNK
PHY
IPv6 AR
IPv6
GRE
IP
LNK
PHY
IPv6
IPv6
LNK
PHY
IPv6 link
• On completion of the network entry procedure (.16 specific):
• A transport connection is established between the host and BS
• In case the AR is separate a L2 tunnel mapped to the transport connection is created between the BS and AR
• The host can now send/receive IP packets (RA/RS, DHCP, ND) - IPv6 link up
Prefix assignment

Each MS is on a separate subnet as a result
of the point-to-point link. One or more /64
prefixes should be assigned to a link which
consists of only an AR and an MS
 A unique prefix(es) is allocated for a host
 The prefix is advertised in a Router
Advertisement (RA) message with standard
Prefix Information Option
Neighbor Discovery

Neighbor Discovery is performed as per RFC
2461.
 Router Discovery


After host attachment, it may send an RS and an
AR would reply with a suitable RA. Or the AR may
send an RA to the host upon IPv6 link
establishment. The AR may send unsolicited RAs
periodically.
Prefix Discovery

Prefix is recommended to be advertised with L-bit
set to facilitate DNA operation.
IPv6 addressing

Interface Identifier



The MS has a 48-bit MAC address as specified in
802.16. With the MAC address, the MS generates
the 64 bit interface identifier (IID) as per RFC2464
for address autoconfiguraiton.
For addresses based on privacy extensions, the
MS may generate random IIDs as specified in
RFC3041.
Duplicate address detection

DAD is performed as per RFC2461 and RFC2462.
IPv6 addressing
Stateless address autoconfiguration is
performed as per RFC 2461, 2462.
 Obtaining the IPv6 address through
stateful address autoconfiguration
method is as per the details in RFC3315

WG LC Issues
Harmonize terminology with the PS doc
 Reference to RFC3314 as the
precedent to be modified and the link
model discussion referenced instead
 MTU value to be used from RA
 Reference DNA I-D instead of RFC4135
 Reference RFC 3633 as a means for
obtaining the prefixes to be assigned
